Pump-rod coupling.



No. 857,659. PATBNTBD JUNE 25, 1907.

C. H. NICHOLS. v

PUMP ROD GOUPLING. APPLICATION FYILBD June. 190s.

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PATENTED JUNE 25, 1'907. C. H. NICHOLS.

`PUMP ROD GOUPLING. APPLIOATION FILED JUNE a, 190e.

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CHARLES H. NICHOLS, OF RUBY, WISCONSIN.

PUMP-ROD COUPLING.

Specification. of Letters Patent.

Patented June 25, 1907.

Application filed June 8,1906. Serial No. 320,861:

To all whom, t may concern:

Be it known that I, CHARLES H. NICHOLS, a citizen of the United States, residing at Ruby, in the county of Chippewa, State of Wisconsin, have invented certain new and useful Improvements in Pump-Rod Couplings; and I do hereby declare the following to be a full, clear, and exact descriptiony of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to couplings for pumps, and has particular reference to couplings between the pitman rod and the piston rod of the pump. A

One object of the invention is to provide a simple, cheap, durable, efficient, and otherwise highly satisfactory pump rod coupling.

Another object of the invention is to provide a pump rod coupling by which the pitman rod and the piston rod of the pump can be connected or` disconnected at any time without the use of a wrench or other tool.

With these and other objects in view, the present invention consists also in the combination and arrangement of parts, as will be hereinafter more fully described, shown in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that changes in the form, proportion, size, and minor details may be made, within the scope of the claims, without departing from the spirit or sacrificing any of the advantages of the present invention.

In the drawings r-Figure 1 is a front elevation of the coupling showing the parts connected. Fig. 2 is a similar view showing the parts disconnected. Fig. 3 is a side view of Fig. 2. Fig. 4 is a longitudinal section, taken through Fig. 3. f

Like parts are designated by corresponding numerals in the several views.

The reference numeral 5 designates the pitman rod, and. 6 the piston rod of the pump. The coupling member 7 is recessed at one end 8 to receive said pitman rod, which is secured therein by the bolt 9. The other end is recessed at 10 to receive the piston rod 6, said recess extending longitudinally and nearly the entire length of the member 7, as shown in Fig. 4. The piston rod 6 is adapted to slide within recess 10 when disconnected. Near the lower end of the member 7 its opposite sides are cut away, to form the corresponding shoulders 12 and 13 the strips 11 likewise formed by such action connecting the shoulder portions above referred to and arranged diametrically opposite each other. From the shoulders 13 the sides are tapered down to the end of the coupling member.

Two spring plates 14 are each secured at one end to the opposite sides of the piston rod 6, and their free ends are each provided 4 with a triangular projection 1 5. These plates are so disposed that when the rod 6 has entered as far as possible within the recess 10, the triangular projections or heads 15 are in line with the shoulders 13. The plates 14 are secured to the piston rod 6 by the bolts 16 at the ends, and by bolts 17 intermediate their length, so that when the parts 6 and 7 are in the position shown in Fig. 1, the spring-plates 14 normally cause the projections 15 to enter the cut-away portions 11, and engage the shoulders 13, thus completing the connection between the pitman rod 5 and the pump piston rod 6, as shown in Fig. 1.

To disengage the parts 15 and 13 a spacer 18 is mounted to slide longitudinally upon the face of the connecting strips 11 formed on the coupling member 7. The said spacer comprises a plate 19 and two right angle flanges 20, adapted to engage the member 7 within the cut-away portions 11. The flanges 20 are of the same depth and width as the recesses 11, and their movement therein is limited by the shoulders 12 and 13. Secured to the center of the plate 19 and extending upward along the face of the member 7 is a rack-bar 21, said rack being guided by a projection 22 on the face of said member, and engaging the gear wheel 23, secured on one end of a shaft 24 mounted to rotate in the boss 25 projecting from one side of the member 7. To the other end of said shaft 24 is secured an operating lever 26, which operates the gear wheel 23 to move the rack-bar 21, and thus reciprocate the spacer between the shoulders 12 and 13.

Vhen the spacer 18 is moved downward,

the flanges 20 first engage theangular faces of the projections 15 and then force them outward out of engagement with shoulders 13, as shown in Fig. 2. IVhen the spacer 1S is in its lowermost position against shoulders 13, the outer edges of the flanges 20' and the sides of the coupling member 7 `are in line, so that if either the pitman 5 or the piston rod 6 be reciprocated, the said parts will be free to move independently of each other.

Vhen the spacer is in position to disengage IOO IIO

the parts, the lever 26 is in the upper position, and a hook 27 is secured to the coupling member to engage said lever and retain it in said position, as shown in Figs. 2 and 4.

It is obvious, however, that the parts may be'reversed, that is, the coupling member secured to the piston rod and the clutch members secured to the pitman rod, and work as advantageously as at present shown.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. In a pump rod coupling, the combination, with a coupling member secured to the pitman rod7 of clutch means secured upon the piston rod of the pump to normally engage said coupling member, a rack slidably mounted upon said coupling member, means carried by said rack for disengaging said clutch means, and means for imparting movement to said rack to actuate said disengaging means.

2. In a pump rod coupling, the combination, with a coupling member secured to the pitman rod, of spring plates secured to the piston rod of the pump, said spring plates being provided with projections to normally engage said coupling member, a rack slidably mounted upon said coupling member, means carried by said rack for disengaging said spring plates, and means for imparting movement to said rack to actuate said disengaging 3. In a pump rod coupling, the combination, with a coupling member secured at one end to the pitman rod and recessed to receive the piston rod of the pump, the opposite sides of said coupling member being provided with corresponding cut away portions forming shoulders thereon, of two spring plates, each secured at one end to opposite sides of said piston rod and having their free ends provided with projections to normally engage said shoulders, a rack slidably mounted upon said coupling member, means secured to said rack for positively disengaging said spring plate projections, and means for actuating said disengaging means.

4. In a pump rod coupling, the combination, with a coupling member secured at one end to the pitman rod and having its other end recessed to receive the piston rod of the pmnp, the opposite sides of said coupling member being provided with corresponding cut-away portions to form shoulders, of two spring plates each secured at one end to opposite sides of the said piston rod, and provided at their free ends with triangular projections normally enga-Qing said shoulders, a spacer mounted to slide upon the face of said coupling member and provided with flanges adapted to enter between said spring plate projections to disengage the same from said shoulders, means to slide said spacer longitudinally of said coupling member, and means to secure said means in the disengaged position.

5. In a pump rod coupling, the combination with a coupling member secured at one end to the pitman rod and having its other end recessed to receive the piston rod of the pump, the opposite sides of said coupling member being provided with corresponding shoulders formed by cutting away corresponding portions of each side thereof, of two spring plates each secured at one end to the opposite sides of the said piston rod and provided at their free ends with triangular eX- tensions normally engaging said shoulders, a spacer mounted upon the face of said coupling member and provided with iianges extending into said cut-away portions, means mounted upon said coupling member to reciprocate said spacer between the shoulders of said cut-away portions to cause the same to enter between the triangular projections of said spring plates and disengage the same therefrom, and means to secure said means in the disengaged position.

6. In a pump rod coupling, the combination, with a coupling member secured at one end to the pitman rod and having its other end recessed to receive the piston rod of the pump, the opposite sides of said coupling member being provided with correspondingly cut-away portions forming shoulders thereon, of two spring plates each secured at one end to opposite sides of said piston rod and provided at their free ends with triangular projections normally engaging said shoulders, a spacer mounted upon the face of said coupling member and provided with flanges extending into said cut-away portions, means mounted upon said coupling member to reciprocate said spacer between the shoulders of said cut-away portions to cause said spacer to enter between the said triangular projections of said spring plates and disengage the same therefrom, said means comprising a rotatable shaft mounted in a boss on one side of said coupling member, a gear Awheel secured to one end of said shaft, and a rack bar secured to said spacer and with which said gear wheel intermeshes, the opposite end of said shaft being provided with an operating lever, and means to secure said lever when the coupling is disengaged.

In testimony whereof, I aiiiX my signature, in presence of two witnesses.

CHARLES H. NICHOLS. Vitnesses GEO. D. BARTLETT, IMBERT ROE.

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